I just got Vonage and am unable to dial out. I get a dial tone and then a recording asking for my mailbox number. I don't want to get to my mailbox I just want the number that I dial to connect to the person I am calling. I am not having problems receiving calls.

If you are in the process of porting your landline to Vonage then that is the answer. When you dial your landline number Vonage thinks that you are dialing your Vonage line and sends you to voicemail. This is normal.